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High Performance Slot-Style MAF Meter / Sensor - Calibrated (11-14 GT)

Market Price $354.90 You Save 17% ($59.45)
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  • Item 393131

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    Features & Details

    • Calibrated for Optimum Performance
    • Improves Performance from 2000 RPM to Red Line
    • Chassis Dyno Proven to Add 10 to 18 Horsepower
    • Improves Mileage and Throttle Response
    • Improves Airflow Compared to Stock
    • Direct Fit Plug-N-Play Replacement
    • Installs in Less than 15 Minutes
    • Sold Individually
    • Fits 2011-2014 GT and BOSS Mustangs
    Calibrated for Optimum Performance. More air equals more power is true, to a point. The problem is that the factory calibrated Mass Air Flow (MAF) Sensor is limited and will "peg" due to too much air. To combat this common issue Granatelli Motor Sports has custom scaled and calibrated their MAF Sensor to accurately read higher volumes of air for optimum performance. This higher calibration makes a GMS High Performance MAF Sensor ideal for use with high flow aftermarket cold air intakes and force inducted applications.

    Power and Performance. With a noticeable increase in airflow over the stock sensor you can expect to see chassis dyno proven increases of 10 to 18 horse power with improvements in performance starting from 2000 rpm's all the way to red line. By installing a GMS High Performance Calibrated MAF Sensor you will not only see an improvement in power and performance, but you will also see an improvement in your fuel mileage and throttle response.

    Plug-N-Play Installation. Designed to be a direct fit plug-n-play replacement for the factory sensor this Granatelli Motor Sports Slot-Style MAF Meter installs with just basic hand tools. No extra modifications are required for an easy 15 minute installation. All necessary parts and instructions are included.

    Application. This Granatelli Motorsports Slot-Style MAF Sensor Meter is specifically designed to fit 2011 to 2014 GT and BOSS Mustang models equipped with the Coyote 5.0L 4 valve V8 engine. Sold individually.

    Fitment: 2011 2012 2013 2014 Details

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) MAF Sensor
    Installation Info
    Tech Specs
    Will it fit my Mustang?

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        Questions & Answers (17)

        5 Top Rated Questions

        I have a 2012 Mustang GT 5.0 with longtube off-road X pipe catback headers with Roush exhaust and a Lund tune. How much gain will I actually see? And will I need to update the tune with this?

        • This GMS High Performance Slot-Style MAF Meter / Sensor is already calibrated, so it will not require a tune to function properly, however, we would highly recommend a tune to see that most out of the meter. We have seen upward of 20hp on on most applications, however, true results will depend on your modifications and/or if you get a tune.

        Helpful (1)

        I have a 2012 GT with a Magnusson Supercharger and many other mods. Right now it produces 526 RWHP (dyno). Can I install this sensor without changing the tune? Will I see improvement over the stock MAF sensor that is there now?

        • The GMS High Performance Slot-Style MAF Meter / Sensor - Calibrated (11-14 GT) will require you to tune the vehicle, especially with all the modifications that you have done to it. If you install this MAF without a tune, there is a chance of you running lean and that can damage the motor.

        Helpful (1)

        Is this only for people without a tune? Or can this be used with a tune and a cai? and if so are the gains still the same?

        • The GMS High Performance Slot-Style MAF Meter / Sensor - Calibrated (11-14 GT) can be used with a tune and some minor bolts ons. If you plan to install this MAF sensor, I suggest getting a new tune that will accommodate the new sensor. If you run this sensor without a tune, it will not give you the same gains as it would with a tune.

        Helpful (1)

        I have a 93 octane Lund tune ,PMAS cold air intake, resonator delete and Roush exhaust. Would this benefit my application and would my tune require any modifications?

        • You may see some minor performance gains with this upgrade. This will already be calibrated, so a tune will not be required.

        Helpful (0)

        I bought this works great. When I ask Bama for a new tune they said they don't tune for these and I should take it off,and go back to factory one. Is this a problem running this?

        • This would not be a problem this is simply something that Bama Performancedoes not tune for. 

        Helpful (0)
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        10 More Questions
        I have a Roush phase 2 supercharger on my 2013 GT. If I install the GMS MAF sensor will I need to get my tune done again? I had to send the PCM to Roush for tuning when I got the supercharger installed. 1 answer
        I bought an tune required AIRAID CAI for my 2011 gt. Would this maf sensor make up for the tune? Or would I still need a tune? 1 answer
        In some cases I've heard that bama will reject to give you a tune because they say they cant tune your car with that sensor. Is this sensor tunable with bama? 1 answer
        I bought this before I supercharged my car. I recently installed a VMP stage II supercharger and I kept this MAF sensor on the car. 2013 5.0 and it seems to be pushing too much fuel. Is it compatible? 1 answer
        I have a Air raid tube required CAI short headers carted xpipe roush exhaust and Bama tune. What kind of gains should I see with a new tune. And is a tune required or just to get max out of it. 1 answer
        Do u need a re tune with this mass air meter? 1 answer
        I've just installed a JLT Performance Cold Air Intake with a tune on my 2012 gt- 5.0. Will I require another tune after installing the GMS sensor? 1 answer
        I have a cobra jet intake manifold and the Ford Racing Cobra Jet Cold Air Intake, would I benefit from this MAF Sensor? 1 answer
        Will I need a tune for this product on a stock 5.0 ? 1 answer
        Is this compatible with Whipple supercharger installations? 1 answer

          Customer Reviews (8) Write a Review

          Overall Rating 4.4

          out of 5 stars

          Installation Time:Less than 1 Hour

          • Performance Gain 5 5
          • Fit 5 5

          • 5/5

            Installation Time: Less than 1 Hour

            May 19, 2019

            Improved lower end!

            Easy install and noticeable pull on the bottom end! Took literally 5 minutes to change!!


            Year: 2012 Submodel: GT

            Helpful (0)

          • 5/5

            Installation Time: Less than 1 Hour

            May 06, 2019

            MAF Meter

            Every bit of what was expected. Throttle response is better and I think it works well with the tune. Felt like there was a definite performance gain. Worth the money for me!


            Year: 2012 Submodel: GT

            Helpful (0)

          • 4/5

            Installation Time: Less than 1 Hour

            October 26, 2018

            Works great

            Works great only down side is Bama says they don't recommend this or tune for it. I've had no problems with it.


            Year: 2014 Submodel: GT

            Helpful (5)

          • 5/5

            Installation Time: Less than 1 Hour

            June 24, 2017

            Easy Performance

            I have a 2012 Boss with the track key, great performance 3000 RPM and above (seat of the pants feel). Slightly better gas mileage. Also, an easy 15 min install.


            Year: 2012 Submodel: Boss

            Helpful (7)

          • 5/5

            Installation Time: Less than 1 Hour

            December 18, 2016

            Installed, works great!

            I have this installed with the Trackey, exhaust mods, Accel Super Coils, 90TB, Spacer, etc.. I have tried two sets of tires (305's in the back) and still spin them like crazy 1st - 3rd, sometimes even in 4th gear. If you have aftermarket coils, it is possible to throw codes from electromagnetic interference which would throw you into safe / limp mode. That would kill performance, so it might be best to put some gold or silver heat tape inside the coil covers to block some of the signals. I did that easy fix, my Boss 302 hauls! I love it.


            Year: 2013 Submodel: Boss

            Helpful (8)

          • 1/5

            August 30, 2016

            Avoid this

            Im not too sure about what kind of builds the other people who reviewed this had. I have a 2014 track pack GT and my mods were the boss mani, bbk tb, steeda cai, tune, headers and gms street fighter coil packs. Im not sure if it was the mods i have or the product itself but for whatever reason when i had this installed the car just drove like a slug. It couldnt even break traction in first gear with this thing installed. I would definitely avoid this product if you plan on having several other mods as well. It doesnt play well with others. I wanna thank AM regardless for the customer service they gave me the full refund as soon as i explained what was happening.


            Year: 2014 Submodel: GT

            Helpful (9)

          • 5/5

            July 12, 2016

            Great addition

            I got my gms sensor and put it stright in my mustang as soon as i got it, with the bbk intake, and bbk 8mm throtlebody the car was even more alive great piece of engineering and great results!


            Year: 2011 Submodel: GT

            Helpful (8)

          • 5/5

            July 12, 2016

            Small upgrade must have for upgraded CAI

            Talked to GMS direct and was uncertain but this piece is a must have for a upgraded CAI!


            Year: 2014 Submodel: GT

            Helpful (7)

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